NC 382T Nic and hang problems...

[f_cava]

Hi. We have a problem with a small "home made" Hyper-V server based on 2008R2 we assembled

We had some during usual operations with standard network card (packet lost, nic hang...). We had similar problems with another identical server and we solved using a HP  NC 382T NIC. So we put the same network card on this server and now it works well during usual work. But when the night the server makes backup on a NAS, after half an hour, the system hang with black screen and no way to do anything. The only thing we can do is reset the server. The drivers are the last one, but also with the integrated we had this problem (on the other server all is perfect with embedded drivers)

Is there anyone that had similar problem with a NIC?